NGC 4449

NGC 4449
A Hubble Space Telescope (HST) image of NGC 4449.
Observation data (J2000 epoch)
Constellation	Canes Venatici[1]
Right ascension	12h 28m 11.9s[2]
Declination	+44° 05′ 40″[2]
Redshift	207 ± 4 km/s[2]
Distance	~12 Mly (~ 3.6 Mpc)[2]
Type	IBm[2]
Apparent dimensions (V)	6′.2 × 4′.4 [2]
Apparent magnitude (V)	10.0[2]
Other designations
UGC 7592,[2] PGC 40973,[2] Caldwell 21
See also: Galaxy, List of galaxies

NGC 4449 (also known as Caldwell 21) is an irregular galaxy in the constellation Canes Venatici. It is located about 12 million light-years away, part of the M94 Group (the Canes Venatici I Group), a galaxy group relatively close to the Local Group containing the Milky Way. The well-studied galaxy is similar in size, and often compared to, the Milky Way's satellite galaxy, the Large Magellanic Cloud (LMC). NGC 4449 has a general bar shape, also characteristic of the LMC, with scattered young blue star clusters. Near the bottom (of the Hubble photo) is the pinkish glow of atomic hydrogen gas, the telltale tracer of massive star forming regions. Interactions with nearby galaxies are thought to have influenced star formation in NGC 4449.

External links

• Astronomy Picture of the Day – May 3, 2007 and July 10, 2007
• NGC 4449 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

References

1. ^ R. W. Sinnott, editor (1988). The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation and Cambridge University Press. ISBN 0-933346-51-4. 
2. ^ ^{a b c d e f g h i} "NASA/IPAC Extragalactic Database". Results for NGC 4449. http://nedwww.ipac.caltech.edu/. Retrieved 2007-07-13.